php在做后台服务器的时候，经常会遇到这种情况，需要解析来自前台的xml文件，并将数据以xml格式返回，在这种情况下，xml与php中关联数组的转化是非常频繁的事情。比如flex和其他客户端程序与服务器的交互，经常会使用这种方法。下面是我归纳的两个方法，大大简化了xml与数组相互转化的工作量。
/**
*
* 将简单数组转化为简单的xml
* @param string $data 要进行转化的数组
* @param string $tag 要使用的标签
* @example
* $arr = array(
'rtxAccount'=>'aaron','ipAddr'=>'192.168.0.12',
'conferenceList'=>array('conference'=>
array(
array('conferenceId'=>1212,'conferenceTitle'=>'quanshi 444','smeAccount'=>'http://www.glzy8.com'),
array('conferenceId'=>454,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'http://www.glzy8.com'),
array('conferenceId'=>6767,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'http://www.glzy8.com'),
array('conferenceId'=>232323,'conferenceTitle'=>'quanshi uuu','smeAccount'=>'http://www.glzy8.com'),
array('conferenceId'=>8989,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'http://www.glzy8.com'),
array('conferenceId'=>1234343212,'conferenceTitle'=>'quanshi meetting','smeAccount'=>'http://www.glzy8.com')
)
)
);
转化为：
<rtxAccount>aaron</rtxAccount>
<ipAddr>192.168.0.12</ipAddr>
<conferenceList>
<conference>
<conferenceId>1212</conferenceId>
<conferenceTitle>quanshi 444</conferenceTitle>
<smeAccount>http://www.glzy8.com</smeAccount>
</conference>
<conference>
<conferenceId>454</conferenceId>
<conferenceTitle>quanshi meetting</conferenceTitle>
<smeAccount>http://www.glzy8.com</smeAccount>
</conference>
<conference>
<conferenceId>6767</conferenceId>
<conferenceTitle>quanshi meetting</conferenceTitle>
<smeAccount>http://www.glzy8.com</smeAccount>
</conference>
<conference>
<conferenceId>232323</conferenceId>
<conferenceTitle>quanshi uuu</conferenceTitle>
<smeAccount>http://www.glzy8.com</smeAccount>
</conference>
<conference>
<conferenceId>8989</conferenceId>
<conferenceTitle>quanshi meetting</conferenceTitle>
<smeAccount>http://www.glzy8.com</smeAccount>
</conference>
<conference>
<conferenceId>1234343212</conferenceId>
<conferenceTitle>quanshi meetting</conferenceTitle>
<smeAccount>http://www.glzy8.com</smeAccount>
</conference>
</conferenceList>
*/
function array2xml($data,$tag = '')
{
$xml = '';
foreach($data as $key => $value)
{
if(is_numeric($key))
{
if(is_array($value))
{
$xml .= "<$tag>";
$xml .= array2xml($value);
$xml .="</$tag>";
}
else
{
$xml .= "<$tag>$value</$tag>";
}
}
else
{
if(is_array($value))
{
$keys = array_keys($value);
if(is_numeric($keys[0]))
{
$xml .=array2xml($value,$key);
}
else
{
$xml .= "<$key>";
$xml .=array2xml($value);
$xml .= "</$key>";
}
}
else
{
$xml .= "<$key>$value</$key>";
}
}
}
return $xml;
}
}
xml2array
/**
*
* 将简单的xml转化成关联数组
* @param string $xmlString xml字符串
* @example
* <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<RTXConferenceReqDTO>
<conferenceTitle>IT交流会</conferenceTitle>
<startTime>2011-12-19 12:00:00</startTime>
<rtxAccount>andy1111111</rtxAccount>
<ipAddr>192.168.1.56</ipAddr>
<duration>120</duration>
<conferenceType>1</conferenceType>
<invitees>
<invitee>
<rtxAccount>被邀请人1的RTX账号</rtxAccount>
<tel>被邀请人1电话号码</tel>
</invitee>
<invitee>
<rtxAccount>被邀请人2的RTX账号</rtxAccount>
<tel>被邀请人2电话号码</tel>
</invitee>
</invitees>
</RTXConferenceReqDTO>
转化之后的关联数组：
Array
(
[conferenceTitle] => IT交流会
[startTime] => 2011-12-19 12:00:00
[rtxAccount] => andy1111111
[ipAddr] => 192.168.1.56
[duration] => 120
[conferenceType] => 1
[invitees] => Array
(
[invitee] => Array
(
[0] => Array
(
[rtxAccount] => 被邀请人1的RTX账号
[tel] => 被邀请人1电话号码
)
[1] => Array
(
[rtxAccount] => 被邀请人2的RTX账号
[tel] => 被邀请人2电话号码
)
)
)
)
*/
function xml2array($xmlString = '')
{
$targetArray = array();
$xmlObject = simplexml_load_string($xmlString);
$mixArray = (array)$xmlObject;
foreach($mixArray as $key => $value)
{
if(is_string($value))
{
$targetArray[$key] = $value;
}
if(is_object($value))
{
$targetArray[$key] = xml2array($value->asXML());
}
if(is_array($value))
{
foreach($value as $zkey => $zvalue)
{
if(is_numeric($zkey))
{
$targetArray[$key][] = xml2array($zvalue->asXML());
}
if(is_string($zkey))
{
$targetArray[$key][$zkey] = xml2array($zvalue->asXML());
}
}
}
}
return $targetArray;
}